Question

4x^2-42x+76 please help

Answer 1

2(2x2−21x+38)

Explanation:

Factor 4x2−42x+76

4x2−42x+76

=2(2x2−21x+38)

Answer 2

x= 8.17 or x= 2.3

Explanation:

Solving for x:

4x^2-42x+76

a=4

b=-42

c=76

Using quadratic formula (attached):

-(-42) ±
`\sqrt(-42)^2-4(4)(76)`/2(4)

= 42±
`\sqrt1764 - 1216`/8

=42±23.4(rounded off)/8

So:

42 + 23.4/8 or 42 - 23.4/8

x= 8.17 or x= 2.3

factoring only:

4x^2-42x+76

2(2x^2-21x+38)

hope this helps you :)